激光加载下钛合金的层裂特性研究  

Research of spallation characteristics of titanium alloy under laser loading

作　　者：姚红兵[1] 唐旺 叶霞[1] YAO Hong-bing;TANG Wang;YE Xia(School of Mechanical Engineering,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]江苏大学机械工程学院,江苏镇江212013

出　　处：《激光与红外》2021年第2期156-160,共5页Laser & Infrared

基　　金：中国国家自然科学基金项目(No.51775253,No.61505071);中央高校基本科研业务费专项资金项目(No.2019B02614);江苏省研究生实践创新计划(No.SJCX19-0549)资助。

摘　　要：为研究激光冲击钛合金层裂行为,利用ABAQUS软件建立了尺寸为16 mm×16 mm×0.2 mm的钛合金在强激光加载下的有限元模型,得到不同激光冲击波峰值压力与冲击波加载时间下的钛合金自由面速度曲线,并根据自由面速度曲线计算出钛合金的应变率及层裂强度。模拟结果表明,在激光能量为10 J、脉宽为5 ns时,钛合金达到了最大的应变率3.34×106 s^(-1)与层裂强度5.26 GPa;钛合金的应变率及层裂强度随着激光冲击波峰值功率的增大而增大,随着激光冲击加载时间的缩短而增大。In order to study the spalling behavior of titanium alloy under laser shock wave,the finite element model of 16mm×16mm×0.2mm titanium alloy was established by using ABAQUS.The curve of free surface velocity of titanium alloy under different peak pressure and loading time of laser shock wave was obtained,and the strain rate and spalling strength of titanium alloy were calculated according to the curve of free surface velocity.The simulation results show that when the laser energy is 10 J and the pulse width is 5 ns,the titanium alloy reaches the maximum strain rate of 3.34×106s^(-1) and the maximum spalling strength of 5.26 GPa;The strain rate and spalling strength of titanium alloy increase with the increase of laser shock wave peak power and the decrease of laser impact loading time.

关 键 词：激光 钛合金 有限元模型 应变率 层裂强度 

分 类 号：TN249[电子电信—物理电子学]